The gr
avity modeling of the Eburru w
as conducted in
an
attempt to deline
ate geologic
al structures controlling he geotherm
al system
and estim
ate the geotherm
al reservoir extent. A tot
al of 375 d
at
a points were used
and
a Bouguer density of 2.27 g/cm3 to gener
ate
a complete Bouguer
anom
aly m
ap of the
are
a. Gr
avity d
at
a were sep
ar
ated into region
al
and residu
al components to enh
ance the structur
al fe
atures from the sediment
ary
and b
asement rocks in the study
are
a. The gr
avity d
at
a were
an
alyzed using gr
adient interpret
ation techniques for edge detection, such
as horizont
al deriv
ative
and
an improved norm
alized horizont
al tilt
angle. For c
arrying out the three-dimension
al (3-D) modeling,
a volume of 12 × 13 km
and 5 km deep w
as selected. The model w
as constr
ained using the estim
ated densities of cuttings obt
ained from the drilled wells. This study presents the interpret
ation results of v
arious gr
avity
anom
aly m
aps
and 3-D inversion model. Interpret
ation of horizont
al deriv
ative
and improved norm
alized horizont
al tilt
angle of gr
avity d
at
a indic
ate the existence of high gr
adient
anom
alies. The
anom
aly m
aps were used to identify sever
al f
aults th
at comp
ared well with the m
apped f
aults. The 3-D model reve
aled
a dense body interpreted
as the geotherm
al reservoir with
a volume of
about 3.0 km3
and
an
aver
age block density v
alue of 2.45 g/cm3 . The dense body which is
a fr
actured zone overlies
a high density body likely to be the he
at source responsible for he
ating the reservoir. There
appe
ars to be
a close rel
ationship between the f
aults system
and the geotherm
al reservoir. These f
aults serve
as fluid p
athw
ays from deeper p
arts to sh
allow regions. The results obt
ained from this study will le
ad to
an improved underst
anding of the geotherm
al system in the study
are
a and
aid the future geotherm
al explor
ation of the field.